%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 1996-2016. All Rights Reserved. %% %% Licensed under the Apache License, Version 2.0 (the "License"); %% you may not use this file except in compliance with the License. %% You may obtain a copy of the License at %% %% http://www.apache.org/licenses/LICENSE-2.0 %% %% Unless required by applicable law or agreed to in writing, software %% distributed under the License is distributed on an "AS IS" BASIS, %% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %% See the License for the specific language governing permissions and %% limitations under the License. %% %% %CopyrightEnd% %% -module(disksup_SUITE). -include_lib("common_test/include/ct.hrl"). %% Test server specific exports -export([all/0, suite/0]). -export([init_per_suite/1, end_per_suite/1]). -export([init_per_testcase/2, end_per_testcase/2]). %% Test cases -export([api/1, config/1, alarm/1]). -export([port/1]). -export([terminate/1, unavailable/1, restart/1]). -export([otp_5910/1]). -export([posix_only/1]). init_per_suite(Config) when is_list(Config) -> ok = application:start(os_mon), Config. end_per_suite(Config) when is_list(Config) -> ok = application:stop(os_mon), Config. init_per_testcase(unavailable, Config) -> terminate(Config), init_per_testcase(dummy, Config); init_per_testcase(_Case, Config) -> Config. end_per_testcase(TC, Config) when TC =:= unavailable; TC =:= posix_only -> restart(Config), end_per_testcase(dummy, Config); end_per_testcase(_Case, _Config) -> ok. suite() -> [{ct_hooks,[ts_install_cth]}, {timetrap,{minutes,1}}]. all() -> Bugs = [otp_5910], Always = [api, config, alarm, port, posix_only, unavailable] ++ Bugs, case test_server:os_type() of {unix, _OSname} -> Always; {win32, _OSname} -> Always; _OS -> [unavailable] end. %% Test of API functions api(Config) when is_list(Config) -> %% get_disk_data() ok = check_get_disk_data(), %% get_check_interval() 1800000 = disksup:get_check_interval(), %% set_check_interval(Minutes) ok = disksup:set_check_interval(20), 1200000 = disksup:get_check_interval(), {'EXIT',{badarg,_}} = (catch disksup:set_check_interval(0.5)), 1200000 = disksup:get_check_interval(), ok = disksup:set_check_interval(30), %% get_almost_full_threshold() 80 = disksup:get_almost_full_threshold(), %% set_almost_full_threshold(Float) ok = disksup:set_almost_full_threshold(0.90), 90 = disksup:get_almost_full_threshold(), {'EXIT',{badarg,_}} = (catch disksup:set_almost_full_threshold(-0.5)), 90 = disksup:get_almost_full_threshold(), ok = disksup:set_almost_full_threshold(0.80), ok. %% Test configuration config(Config) when is_list(Config) -> %% Change configuration parameters and make sure change is reflected %% when disksup is restarted ok = application:set_env(os_mon, disk_space_check_interval, 29), ok = application:set_env(os_mon, disk_almost_full_threshold, 0.81), ok = supervisor:terminate_child(os_mon_sup, disksup), {ok, _Child1} = supervisor:restart_child(os_mon_sup, disksup), 1740000 = disksup:get_check_interval(), 81 = disksup:get_almost_full_threshold(), %% Also try this with bad parameter values, should be ignored ok = application:set_env(os_mon, disk_space_check_interval, 0.5), ok = application:set_env(os_mon, disk_almost_full_threshold, -0.81), ok = supervisor:terminate_child(os_mon_sup, disksup), {ok, _Child2} = supervisor:restart_child(os_mon_sup, disksup), 1800000 = disksup:get_check_interval(), 80 = disksup:get_almost_full_threshold(), %% Reset configuration parameters ok = application:set_env(os_mon, disk_space_check_interval, 30), ok = application:set_env(os_mon, disk_almost_full_threshold, 0.80), ok. %%---------------------------------------------------------------------- %% NOTE: The test case is a bit weak as it will fail if the disk usage %% changes too much during its course, or if there are timing problems %% with the alarm_handler receiving the alarms too late %%---------------------------------------------------------------------- %% Test that alarms are set and cleared alarm(Config) when is_list(Config) -> %% Find out how many disks exceed the threshold %% and make sure the corresponding number of alarms is set Threshold1 = disksup:get_almost_full_threshold(), % 80 Data1 = disksup:get_disk_data(), Over1 = over_threshold(Data1, Threshold1), Alarms1 = get_alarms(), if Over1==length(Alarms1) -> true; true -> dump_info(), ct:fail({bad_alarms, Threshold1, Data1, Alarms1}) end, %% Try to find a disk with space usage below Threshold1, %% lower the threshold accordingly and make sure new alarms are set Fun1 = fun({_Id, _Kbyte, Capacity}) -> if Capacity>0, Capacity<Threshold1 -> true; true -> false end end, case until(Fun1, Data1) of {_, _, Cap1} -> Threshold2 = Cap1-1, ok = disksup:set_almost_full_threshold(Threshold2/100), disksup ! timeout, % force a disk check Data2 = disksup:get_disk_data(), Over2 = over_threshold(Data2, Threshold2), Alarms2 = get_alarms(), if Over2==length(Alarms2), Over2>Over1 -> true; true -> dump_info(), ct:fail({bad_alarms, Threshold2, Data2, Alarms2}) end; false -> ignore end, %% Find out the highest space usage among all disks %% and try to raise the threshold above this value, %% make sure all alarms are cleared Fun2 = fun({_Id, _Kbyte, Capacity}, MaxAcc) -> if Capacity>MaxAcc -> Capacity; true -> MaxAcc end end, case lists:foldl(Fun2, 0, Data1) of Max when Max<100 -> Threshold3 = Max+1, ok = disksup:set_almost_full_threshold(Threshold3/100), disksup ! timeout, % force a disk check Data3 = disksup:get_disk_data(), Over3 = over_threshold(Data3, Threshold3), Alarms3 = get_alarms(), if Over3==0, length(Alarms3)==0 -> ok; true -> dump_info(), ct:fail({bad_alarms, Threshold3, Data3, Alarms3}) end; 100 -> ignore end, %% Reset threshold ok = disksup:set_almost_full_threshold(Threshold1/100), ok. over_threshold(Data, Threshold) -> Data2 = remove_duplicated_disks(lists:keysort(1, Data)), lists:foldl(fun ({_Id, _Kbyte, Cap}, N) when Cap>=Threshold -> N+1; (_DiskData, N) -> N end, 0, Data2). %% On some platforms (for example MontaVista) data for one disk can be %% "duplicated": %% Linux ppb 2.4.20_mvl31-pcore680 #1 Sun Feb 1 23:12:56 PST 2004 ppc unknown %% %% MontaVista(R) Linux(R) Professional Edition 3.1 %% %% [ppb:~]> /bin/df -lk %% Filesystem 1k-blocks Used Available Use% Mounted on %% rootfs 8066141 3023763 4961717 38% / %% /dev/root 8066141 3023763 4961717 38% / %% tmpfs 192892 0 192892 0% /dev/shm %% %% disksup: %% [{"/",8066141,38}, {"/",8066141,38}, {"/dev/shm",192892,0}] %% %% disksup will only set ONE alarm for "/". %% Therefore the list of disk data must be sorted and duplicated disk %% tuples removed before calculating how many alarms should be set, or %% the testcase will fail erroneously. remove_duplicated_disks([{Id, _, _}, {Id, Kbyte, Cap}|T]) -> remove_duplicated_disks([{Id, Kbyte, Cap}|T]); remove_duplicated_disks([H|T]) -> [H|remove_duplicated_disks(T)]; remove_duplicated_disks([]) -> []. get_alarms() -> lists:filter(fun ({{disk_almost_full, _Disk},_}) -> true; (_) -> false end, alarm_handler:get_alarms()). until(Fun, [H|T]) -> case Fun(H) of true -> H; false -> until(Fun, T) end; until(_Fun, []) -> false. %% Test that disksup handles a terminating port program port(Config) when is_list(Config) -> Str = os:cmd("ps -ef | grep '[d]isksup'"), case io_lib:fread("~s ~s", Str) of {ok, [_Uid,Pid], _Rest} -> %% Monitor disksup MonRef = erlang:monitor(process, disksup), [{_Disk1,Kbyte1,_Cap1}|_] = disksup:get_disk_data(), true = Kbyte1>0, %% Kill the port program case os:cmd("kill -9 " ++ Pid) of [] -> %% disksup should now terminate receive {'DOWN', MonRef, _, _, {port_died, _Reason}} -> ok; {'DOWN', MonRef, _, _, Reason} -> ct:fail({unexpected_exit_reason, Reason}) after 3000 -> ct:fail({still_alive, Str}) end, %% Give os_mon_sup time to restart disksup ct:sleep({seconds,3}), [{_Disk2,Kbyte2,_Cap2}|_] = disksup:get_disk_data(), true = Kbyte2>0, ok; Line -> erlang:demonitor(MonRef), {skip, {not_killed, Line}} end; _ -> {skip, {os_pid_not_found, Str}} end. terminate(Config) when is_list(Config) -> ok = application:set_env(os_mon, start_disksup, false), ok = supervisor:terminate_child(os_mon_sup, disksup), ok. %% Test correct behaviour when service is unavailable unavailable(Config) when is_list(Config) -> %% Make sure all API functions return their dummy values [{"none",0,0}] = disksup:get_disk_data(), 1800000 = disksup:get_check_interval(), ok = disksup:set_check_interval(5), 80 = disksup:get_almost_full_threshold(), ok = disksup:set_almost_full_threshold(0.9), ok. restart(Config) when is_list(Config) -> ok = application:set_env(os_mon, start_disksup, true), ok = application:set_env(os_mon, disksup_posix_only, false), case supervisor:restart_child(os_mon_sup, disksup) of {ok, _Pid} -> ok; {error, running} -> ok end. %% Test that alarms are cleared if disksup crashes or %% if OS_Mon is stopped otp_5910(Config) when is_list(Config) -> %% Make sure disksup sets at least one alarm Data = lists:sort(disksup:get_disk_data()), Threshold0 = disksup:get_almost_full_threshold(), Threshold = case over_threshold(Data, Threshold0) of 0 -> [{_Id,_Kbyte,Cap}|_] = Data, io:format("Data ~p Threshold ~p ~n",[Data, Cap-1]), ok = disksup:set_almost_full_threshold((Cap-1)/100), Cap-1; _N -> Threshold0 end, ok = application:set_env(os_mon, disk_almost_full_threshold, Threshold/100), disksup ! timeout, % force a disk check Data2 = disksup:get_disk_data(), Over = over_threshold(Data2, Threshold), Alarms = get_alarms(), if Over==0 -> ct:fail({threshold_too_low, Data2, Threshold}); Over==length(Alarms) -> ok; true -> dump_info(), ct:fail({bad_alarms, Threshold, Data2, Alarms}) end, %% Kill disksup exit(whereis(disksup), faked_disksup_crash), %% Wait a little to make sure disksup has been restarted, %% then make sure the alarms are set once, but not twice ct:sleep({seconds,1}), Data3 = disksup:get_disk_data(), Alarms2 = get_alarms(), if length(Alarms2)==length(Alarms) -> ok; true -> dump_info(), ct:fail({bad_alarms,Threshold,Data3,Alarms,Alarms2}) end, %% Stop OS_Mon and make sure all disksup alarms are cleared ok = application:stop(os_mon), ct:sleep({seconds,1}), Alarms3 = get_alarms(), case get_alarms() of [] -> ok; _ -> ct:fail({alarms_not_cleared, Alarms3}) end, %% Reset threshold and restart OS_Mon ok = application:set_env(os_mon, disksup_almost_full_threshold, 0.8), ok = disksup:set_almost_full_threshold(0.8), ok = application:start(os_mon), ok. %% Test disksup_posix_only option posix_only(Config) when is_list(Config) -> %% Set option and restart disksup ok = application:set_env(os_mon, disksup_posix_only, true), ok = supervisor:terminate_child(os_mon_sup, disksup), {ok, _Child1} = supervisor:restart_child(os_mon_sup, disksup), ok = check_get_disk_data(). dump_info() -> io:format("Status: ~p~n", [sys:get_status(disksup)]). check_get_disk_data() -> [{Id,KByte,Capacity}|_] = get_disk_data(), true = io_lib:printable_list(Id), true = is_integer(KByte), true = is_integer(Capacity), true = Capacity>0, true = KByte>0, ok. % filter get_disk_data and remove entriew with zero capacity % "non-normal" filesystems report zero capacity % - Perhaps errorneous 'df -k -l'? % - Always list filesystems by type '-t ufs,zfs,..' instead? % It is unclear what the intention was from the beginning. get_disk_data() -> get_disk_data(disksup:get_disk_data()). get_disk_data([{"none",0,0}=E]) -> [E]; get_disk_data([{_,_,0}|Es]) -> get_disk_data(Es); get_disk_data([E|Es]) -> [E|get_disk_data(Es)]; get_disk_data([]) -> [].